<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>
<div>
    <h1>注册页面</h1>
    <input type="text" placeholder="用户名" v-model="user.username">
    <input type="password" placeholder="密码" v-model="user.password">
    <input type="text" placeholder="昵称" v-model="user.nickname">
    <input type="button" value="注册" @click="reg()">
</div>
<script src="https://cdn.staticfile.org/vue/2.2.2/vue.min.js"></script>
<script src="https://cdn.bootcdn.net/ajax/libs/axios/0.21.1/axios.min.js"></script>
<script>
  let v = new Vue({
    el:"body>div",
    data:{
        user:{
            username:"",password:"",nickname:""
        }
    },
    methods:{
        reg(){
            axios.post("/reg",v.user).then(function (response) {
                if(response.data==1){
                    alert("注册成功")
                    location.href="/";
                }else {
                    alert("用户名已存在!")
                }
            })
        }
    }
  })
</script>
</body>
</html>